Missing the 10th Parcel opening reward

nuitrari

I opened my 10th parcel today one 2 characters and I didn't get any of the 10 opening rewards, I found that odd so I looked at the details of my parcel again.
5 reward was there 15 reward was there and 20 rewards was there but the 10 one was missing, it was there yesterday but its gone today.
Any one else noticed that or is it just a bug I got?